Most have extraction tools. Otherwise yes. However, if you have Forces of Corruption, there should be a folder for modding. If this is your first mod, then all should be fine by dragging the folders into the required destination - game data. I would recomend that once you move on to a new mod, you do a 'Repair' or re-install of the current game again because I have noticed that things can get a little confusing when certain files are overwritten and others are not